CVE-2023-39737: Linecorp Matsuya

High severity, CVSS 8.2. EPSS: 0.6% chance of exploitation in the next 30 days.

The leakage of the client secret in Matsuya Line 13.6.1 allows attackers to obtain the channel access token and send crafted broadcast messages.

Affected products

• Linecorp Matsuya: version 13.6.1 only

Published 2023-10-25. Last modified 2026-06-17.